V.Uma maheswari2, Department of Civil Engg,
N.S.N.College of Engineering and Technology,Karur-639 003,Tamilnadu,India
ABSTRACT:- Rapid urbanization and industrialization in developing countries like India pose severe problems in
collection, treatment and disposal of effluent. A number of Industry waste water plays an important role and also pollute
the environment. We can extract heavy metals in the industrial waste water. Biological treatment is applied to that waste
water.The advanced biological treatment RBC(Rotating biological contactor) is adopted.The RBC process involves
allowing the wastewater to come in contact with a biological medium in order to remove pollutants in the waste water.A
rotating biological contactor is a type of secondary treatment process. Coagulation is one of the most widely used for
wastewater treatment,as it is efficient and simple to operate.The natural coagulants like cow dung, wood ash,moringa seed
powder are used to remove heavymetals in the industrial waste water.It is bio-degradability, safe for human
health,environmental friendly and produce no secondary sludge.
Keywords: RBC, Cow dung, Wood ash, Moringa seed powder, Natural coagulant, Textile raw water
1. INTRODUCTION
The increase in urbanization results in growth of industries causing increase in pollution of environment. The waste
water released from the industries are discharged directly into water sources leading to higher pollution rate.The textile
industries use dyes and pigments to colour their products. These are the main source of waste water generated during dyeing
and finishing stages. When these coloured effluents enter rivers or any surface water system they upset biological activity,
aquatic ecosystem, agricultural growth.
Hence the land irrigated with textile effluent acts as sink for heavy metals and other chemicals consequently reduces
soil fertility. The textile effluent contains high level of iron and carbonates which causes stain in plants. The water irrigated
for the agriculture should satisfy the standard values for irrigation. It also depends upon the type of crop, nature of soil,
climatic conditions etc.,The conventional water treatment process such as coagulation, membrane separation, and
electrochemical, reverse osmosis suffers from one or more limitations for complete removal
of dye. Now-a-days special attention has been focussed on the rise of natural adsorbents based on environmental and
economic point of view. This project aims at the use of natural product which is easily available to treat the waste water. Due
to their high carbon content and hardness, wood ash,animal waste and drumstic seed powder are the excellent raw materials
to extracting heavymetals and influencing oxygen demand. The major advantage of this method is simplicity,low energy and
less land requirement.
2. Objectives
 To provide environmentally safe water for agricultural purpose.
 To remove colour, odour, turbidity from the waste water.
 To reuse the waste water.
 To extract heavymetals using natural coagulant.
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High pH results in soil infiltration and permeability problems.
High levels of iron and carbonate cause stain in plants.
Low salinity water causes the soil impermeable.
Increased turbidity affects the levels of photosynthesis.
Increase in temperature increases the rate if algae nitrate concentrations results in unpleasant odour and taste of
water.

3.2. Effects of Textile Effluent on Environment
 The colloidal matter present along with the colours and oily scum increases the turbidity, gives foul smell.
 High levels of toxicity due to the presence of nickel, mercury, cadmium etc.,
4. Methodology

5. Materials
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Textie raw water
Cow dung
Wood ash
Moringa seed powde
6.RBC Process

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Take the samples and analysing the pH, turbidity, alkalinity after that the sample is filled in the different beakers and
is placed in jar test apparatus.

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The coagulants like cow dung, wood ash, moringa seed powder are added in the samples (10 ml,15 ml,20 ml),(10
gm/150 ml) and after that the paddle is rotated in 100rpm,15 minutes allow the rotation process.

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After that the process is stopped and allow solids settle for 10 to 15 minutes. The clear water appear in top portion.
To take this clear water and analysing the turbidity